Rick Jones wrote: > wondering about some of the previous discussion about USB > and how it is perhaps not "evil" but considered quite > sub-par for serving-up the PPS signal. > > Is that unsuitability inherent in USB, so it matters not > whether there is anything else on the USB, or is it more > a case of being "bad" generally only when other things > are on the same USB? I'm still looking to go serial, > but was wondering.
Just, higher 7 less deterministic latency than a real serial port. > If I happen to have say four servers in a location which > might loose its connectivity to the outside world I > probably don't want those servers to fall-back on > LOCAL(0) right? Would configuring each to have the other > three as "peer" entities be the way to go? > > Pointers to the fine manual for any of the above would be welcome. <http://www.eecis.udel.edu/~mills/ntp/html/orphan.html> <http://www.eecis.udel.edu/~mills/ntp/html/miscopt.html#tos> <http://support.ntp.org/bin/view/Support/OrphanMode> When you have a group of computers on a LAN configured for orphan mode, and they lose contact with remote servers, the LAN client/servers will follow each other around. Then when the remote servers can be contacted again, the remote servers are selected. e.g. I use something similar to this on all PCs / Devices # ALL (Clients and/or Servers) tos cohort 1 orphan 11 restrict default limited kod nomodify notrap restrict 127.0.0.1 restrict source nomodify keys "/etc/ntp.keys" # e.g. contains: 123 M YOUR_MD5_KEY trustedkey 123 manycastserver 224.0.1.1 manycastclient 224.0.1.1 key 123 preempt multicastclient 224.0.1.1 key 123 preempt broadcastclient .... and add Server, Pool, Peer and RefClock lines to your Primary Server (& Secondary if you have one). e.g. peer clepsydra.dec.com iburst # Corp HP Western Research Laboratory, Palo Alto, CA server ntp-cup.external.hp.com iburst prefer # Corp Cupertino CA (SF Bay area) server clock.via.net iburst # Local to Palo Alto, CA server clock.isc.org iburst # Local to Palo Alto, CA server 12.230.209.133 iburst # AS71 peer 7018 server sl-crs1-ria-0-3-3-0.sprintlink.net iburst # AS71 peer 1239 server tardy.usa.hp.com iburst # LAN pool 0.hp.pool.ntp.org iburst preempt # HP doesn't actually appear to have a vendor pool? pool 0.dec.pool.ntp.org iburst preempt # DEC doesn't actually appear to have a vendor pool? pool us.pool.ntp.org iburst preempt # Regional pool in lieu of a vendor pool? You might want to contact for advice: "[email protected]" & "[email protected]" -- E-Mail Sent to this address <[email protected]> will be added to the BlackLists. _______________________________________________ questions mailing list [email protected] http://lists.ntp.org/listinfo/questions
